Toilet

ABSTRACT

A toilet, including: a bowl member having a contraction portion, which is narrowed from a top to a bottom thereof. There is a water passing rim provided at the top rim of the contraction portion. A receiving portion is provided below the contraction portion. The receiving portion connects with a discharging pipe. A water tank places at one side of the bowl member. The water tank has an exit. A divided pipe places under the tank and connects with the exit. The divided pipe has a first exit and a second exit. A down tunnel connects with the second exit of the divided pipe in one end and with the receiving portion in the other end. The end of the down tunnel that connects with the receiving portion points to the discharging pipe and forms a jet water delivery port. The down tunnel has a downward section. A water rim duct connects with the first exit of the divided pipe in one end and the water passing rim in the other end. An air ductule, the down end of the air ductule connects with the downward section of the down tunnel and the up end of the air ductule connects with the water passing rim.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to equipment in the bathroom. Moreparticular, to a toilet.

2. Description of the Related Art

In present, a toilet that works with gravity has a wider enter 1 under awater tank and connects with a down tunnel 2 and a water passing rim 3as disclosed in U.S. Pat. No. 5,918,325 and FIG. 1. The toilet uses themomentum that generates from the gravitational potential energy of waterand the siphon effect in the discharging pipe 4 to provide the flushfunction. But, the gravitational potential energy of water can notperform the best condition in these structures. The reasons are:

1. Under still condition, there is air left inside the down tunnel 2between the water tank and the water surface 5. When the valve isopened, air will resist water flow. So, the gravitational potentialenergy of water can not release smoothly. According to the formula offloating power, floating power equals to the gravity of the liquidvolume that is excluded and therefore the momentum will lose. This isthe reason why the water tank must has water more than 1.28 gallons.Usually, the water tank must have more than 1.6 gallons water to reachthe flush standard.

2. There is a wider down tunnel that connects with the water passing rimunder the water tank in present product. Therefore, when the valve isopened, water and air in the connection place of the down tunnel and thewater passing rim mix together easily and air will be flushed away withwater to the jet water delivery port. This phenomenon reduce the kineticenergy of water flow and produces big bubble effection. This structureis also difficult to use in a save water toilet.

3. Most of the toilets now are made from pottery in one unity. Theprecision is poor and the size of those tunnels is not easy to control.Meanwhile, there are many other limitations like material or model. So,the down tunnel has a chequered size, shape and cross-section. It isalso not easy to make the down tunnel into perfect circular shape tomatch the request of hydrodynamics. The chequered size, shape andcross-section will reduce the water power. For example, in a basichydrodynamics formula, an equal diameter of a pipe that is not in acircular shape and has 900 mm in cross-section and 120 mm incircumference is

D=4Rh

Rh=900/120=7.5

D=4Rh=4×7.5=30 mm

So, the equal diameter of the pipe that has 900 mm in cross-section is30 mm. that means the pipe equal to a perfect circular pipe that has 30mm diameter. But, the transition efficiency of the pipe is

700/900=0.77

That means the pipe has only 77% transition efficiency than a perfectcircular pipe. In order to make up the momentum, the water tank needsmore water.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a toilet, which canprovide a good flushed efficiency and save water.

To achieve object of the present invention, a toilet including: a bowlmember having, a contraction portion, which is narrowed from a top to abottom thereof. There is a water passing rim provided at the top rim ofthe contraction portion. A receiving portion is provided below thecontraction portion. The receiving portion connects with a dischargingpipe. A water tank places at one side of the bowl member. The water tankhas an exit. A divided pipe places under the tank and connects with theexit. The divided pipe has a first exit and a second exit. A down tunnelconnects with the second exit of the divided pipe in one end and withthe receiving portion in the other end. The end of the down tunnel thatconnects with the receiving portion points to the discharging pipe andforms a jet water delivery port. The down tunnel has a downward section.A water rim duct connects with the first exit of the divided pipe in oneend and the water passing rim in the other end. An air ductule, the downend of the air ductule connects with the downward section of the downtunnel and the up end of the air ductule connects with the water passingrim.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of prior art.

FIG. 2 is a partial sectional view of the first embodiment of presentinvention;

FIG. 3 is a sectional view at line 3-3 of FIG. 1.

FIG. 4 is a partial sectional view of the first embodiment of presentinvention shown the other side;

FIG. 5 is a partial sectional view of the second embodiment of presentinvention;

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 2 to FIG. 5, a toilet of present invention, including:

A bowl member 10 has a contraction portion 11, which is narrowed from atop to a bottom thereof. There is a water passing rim 12 provided at thetop rim of the contraction portion 11. A receiving portion 13 isprovided below the contraction portion 11. The receiving portion 13connects with a discharging pipe 14. The discharging pipe has a flatsection 141, an upward section 142, a converted section 143 and adownward section 144.

A water tank 20 places at one side of the bowl member 10. The water tankhas a valve (not shown in FIG.) and an exit 21.

The characters of present invention are that:

A divided pipe 30 places under the tank and connects with the exit 21.The divided pipe 30 has a first exit 31 and a second exit 32.

A down tunnel 40 connects with the second exit 32 of the divided pipe 30in one end and with the receiving portion 13 in the other end. The endof the down tunnel 40 that connects with the receiving portion 13 pointsto the discharging pipe 14 and forms a jet water delivery port 41. Thedown tunnel 40 has a downward section 41, a flat section 42 and anaduncous section 43. The down tunnel 40 makes from plastic or makes ofmetal rather than makes from pottery. So, the inside cross-section canbe au uniform and accordant circle to match the hydrodynamics and reducethe loss.

A water rim duct 50 connects with the first exit 31 of the divided pipein one end and the water passing rim 12 in the other end.

An air ductule 60, the down end of the air ductule 60 connects with thesecond half of the down tunnel 40. The best connection position is nearand over the water surface in the receiving portion 13 about 15˜20 mm.The up end of the air ductule 60 connects with the water rim duct 50.The included angle θ between the axial of the up end and the axial ofthe water rim duct 50 is better equal to or small than 90 degrees. Bythe way, the air can flow along with the current direction in the waterrim duct 50.

The arrangement and operation method of present invention are the samewith the prior art. The gravity makes water in the water tank to flushinto the divided pipe 30 when the valve of present invention is opened.The current divides into two parts, one part goes into the water passingrim 12 by passing through the first exit 31 and the water rim duct 50.The other part goes into the down tunnel 40 by passing through thesecond exit 32. In present invention, the inside cross-section of thedown tunnel 40 that makes from plastic or makes of metal is similar toperfect circle. It is different from the pottery of prior art. So, theinside shape and size of the down tunnel 40 can be controlled stably andefficiently to match the hydromanics rules. Water runs more smoothly andthe impulse lose can be avoided therefore. The gravity of water releasesmore smoothly.

Moreover, when water runs into the down tunnel 40, air in the downtunnel 40 will be sucked out from the air ductule 60 by the waterpressure and the pump effection of the water rim duct 50. Accordingly,air in the down tunnel 40 will not run up and will not against theimpulse of water. The gravity of water can be released smoothly withoutthis resistance. The jet water delivery port 41 no longer has big bubbleeffection. The flow rate at the jet water delivery port 41 can be fasterthan prior art and therefore water quantity can be reduced. The quantityof water in a single flush can be reduced under 1 gallon and still matchthe flush standard.

The connection place of the air ductule 60 of present invention is notlimited. As shown in FIG. 5, the air ductule 60 can connect with thedown tunnel 40 and the water passing rim 12 directly and also providesthe same exhaust effect.

Although the invention has been shown and described with respect topreferred embodiments thereof. It should be understood by those skilledin the art that the foregoing and other changes in the form and detailthereof may be made therein without departing from the spirit and scopeof the invention.

1. A toilet, including: a bowl member having a contraction portion,which is narrowed from a top to a bottom thereof and there being a waterpassing rim provided at the top rim of the contraction portion; areceiving portion being provided below the contraction portion; thereceiving portion connecting with a discharging pipe; a water tankplacing at one side of the bowl member and the water tank having anexit; the characters of present invention being that: a divided pipeplacing under the tank and connecting with the exit, the divided pipehaving a first exit and a second exit; a down tunnel connecting with thesecond exit of the divided pipe in one end and with the receivingportion in the other end; the end of the down tunnel that connects withthe receiving portion pointing to the discharging pipe and formed a jetwater delivery port; the down tunnel having a downward section; a waterrim duct connecting with the first exit of the divided pipe in one endand the water passing rim in the other end; an air ductule, the down endof the air ductule connecting with the downward section of the downtunnel; the up end of the air ductule connecting with the water rimduct.
 2. The toilet as claimed in claim 1, wherein the down end of theair ductule connects with the second half of the down tunnel.
 3. Thetoilet as claimed in claim 2, wherein the down end of the air ductuleconnects with the second half of the down tunnel and the best connectionposition is near and over the water surface in the receiving portion. 4.The toilet as claimed in claim 3, wherein the down end of the airductule connects with the second half of the down tunnel and the bestconnection position is near and over the water surface in the receivingportion about 15˜20 mm.
 5. The toilet as claimed in claim 2, wherein thedown tunnel has a downward section, a flat section and an aduncoussection.
 6. The toilet as claimed in claim 1, wherein the included anglebetween the axial of the up end and the axial of the water rim duct isbetter equal to or small than 90 degrees.
 7. The toilet as claimed inclaim 1, wherein the inside cross-section of the down tunnel hascircular shape.
 8. The toilet as claimed in claim 1, wherein the downtunnel makes from non-pottery material.
 9. The toilet as claimed inclaim 1, wherein the down tunnel makes from plastic.
 10. The toilet asclaimed in claim 1, wherein the down tunnel makes of metal.
 11. Atoilet, including: a bowl member having a contraction portion, which isnarrowed from a top to a bottom thereof and there being a water passingrim provided at the top rim of the contraction portion; a receivingportion being provided below the contraction portion; the receivingportion connecting with a discharging pipe; a water tank placing at oneside of the bowl member and the water tank having an exit; thecharacters of present invention being that: a divided pipe placing underthe tank and connecting with the exit, the divided pipe having a firstexit and a second exit; a down tunnel connecting with the second exit ofthe divided pipe in one end and with the receiving portion in the otherend; the end of the down tunnel that connects with the receiving portionpointing to the discharging pipe and formed a jet water delivery port;the down tunnel having a downward section: a water rim duct connectingwith the first exit of the divided pipe in one end and the water passingrim in the other end; an air ductule, the down end of the air ductuleconnecting with the downward section of the down tunnel; the up end ofthe air ductule connecting with the water passing rim.
 12. The toilet asclaimed in claim 11, wherein the down end of the air ductule connectswith the second half of the down tunnel.
 13. The toilet as claimed inclaim 12, wherein the down end of the air ductule connects with thesecond half of the down tunnel and the best connection position is nearand over the water surface in the receiving portion.
 14. The toilet asclaimed in claim 13, wherein the down end of the air ductule connectswith the second half of the down tunnel and the best connection positionis near and over the water surface in the receiving portion about 15˜20mm.
 15. The toilet as claimed in claim 11, wherein the down tunnel has adownward section, a flat section and an aduncous section.
 16. The toiletas claimed in claim 11, wherein the inside cross-section of the downtunnel has circular shape.
 17. The toilet as claimed in claim 11,wherein the down tunnel makes from non-pottery material.
 18. The toiletas claimed in claim 11, wherein the down tunnel makes from plastic. 19.The toilet as claimed in claim 11, wherein the down tunnel makes ofmetal.